Bidirectional switch isolation driving and detection circuit and device
A two-way switch, isolated drive technology, applied in electronic switches, electrical components, pulse technology and other directions, can solve the problem of inability to obtain the working status of the switch in reverse, redundant circuit design, one-way signal flow, etc., to save quantity, avoid Mis-driving, realizing the effect of signal decoupling
Pending Publication Date: 2022-04-08
深圳市联洲国际技术有限公司
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Problems solved by technology
[0003] However, the signal flow of the isolation part of the existing isolated drive bidirectional switch is unidirectional, that is, the switch can only be controlled by the isolation device, and the working state of the switch cannot be obtained reversely.
If it is necessary to reversely obtain the working state of the switch, an additional isolation circuit needs to be added, the circuit design is redundant, and the cost is high
Method used
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Embodiment Construction
[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0042] In order to facilitate those skilled in the art to understand embodiment, some terms are explained:
[0043] (1) MOS tube: MOSFET tube; generally metal (metal) - oxide (oxide) - semiconductor (semiconductor) field effect transistor, or metal - insulator (insulator) - semiconductor. G: gate gate; S: source source; D: drain drain.
[0044] (2) GPIO: General-purpose input / output, the abbreviation of general-purpose input and output.
[0045] (3) HVAC: Heating, Ventilation and Air Conditioning, heating ventilation and air co...
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The invention discloses a bidirectional switch isolation driving and detection circuit and device, and the circuit comprises a first circuit which comprises a switch driving circuit, a driving signal detection circuit and a bidirectional switch which are sequentially coupled; the second circuit comprises a load access signal detection circuit, a higher harmonic generation circuit and a load which are coupled in sequence; the load is coupled with the bidirectional switch; the first end of the decoupling circuit is respectively coupled with the switch driving circuit and the driving signal detection circuit; the second end of the decoupling circuit is coupled with the load access signal detection circuit and the higher harmonic generation circuit. According to the technical scheme of the invention, the driving and detection functions of the bidirectional switch are realized by using a single isolation device, so that the isolation device has the bidirectional transmission capability of signals, the number of the isolation devices is reduced, and the cost and the space are saved.
Description
technical field [0001] The invention belongs to the technical field of semiconductor switch control, and in particular relates to a bidirectional switch isolation driving and detection circuit and device. Background technique [0002] The semiconductor bidirectional switch is mainly used to control the on and off of the alternating current, and usually consists of two field effect transistors or transistors in reverse series. When bidirectional switches are applied in actual products, requirements such as electromagnetic compatibility, anti-surge, and anti-static need to be considered. Therefore, isolated drivers are required in most applications. [0003] However, the signal flow of the isolation component of the existing isolated driving bidirectional switch is unidirectional, that is, the switch can only be controlled by the isolation device, and the working state of the switch cannot be obtained reversely. If it is necessary to reversely obtain the working state of the ...
Claims
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Inventor 赖文焯
Owner 深圳市联洲国际技术有限公司